| 摘要 |
PURPOSE:To easily execute programming and bedug by constituting so as to operate normally even when a new subroutine is called from the subroutine of a matching mode. CONSTITUTION:When a matching mode is detected by the subroutine mode detection circuit 12, the contents of one stack pointer 11 are transferred to the other stack pointer 14. And, the contents of two pointers 11, 14 are sent to the control counter save stack 6 and the subroutine return address stack 10 through the pointer multiplexer 15. In this case, at the time of execution of a matching subroutine, the pointer multiplexer control circuit 16 controls switching so that the multiplexer 15 can selects the contents of the other pointer 14 when a data has matched. According to such a constitution, since a program can be shortened, the programming and debug are executed easily. |
